Open AccessRapidly developing data transmission technologies result in making the network equipment modernization inevitable. There are various options to upgrade the SDH networks, for example, by increasing the capacity of network overloaded sites, the entire network capacity by replacement of the equipment or by creation of a parallel network, by changing the network structure with the organization of multilevel hierarchy of a network, etc. All options vary in a diversity of parameters starting with the solution cost and ending with the labor intensiveness of their realization. Thus, there are no certain standard approaches to the rules to choose an option for the network development. The article offers the technique for choosing the SHD network upgrade based on method of expert evaluations using as a tool the software complex that allows us to have quickly the quantitative characteristics of proposed network option. The technique is as follows:
1. Forming a perspective matrix of services inclination to the SDH networks.
2. Developing the several possible options for a network modernization.
3. Formation of the list of criteria and a definition of indicators to characterize them by two groups, namely costs of the option implementation and arising losses; positive effect from the option introduction.
4. Criteria weight coefficients purpose.
5. Indicators value assessment within each criterion for each option by each expert. Rationing of the obtained values of indicators in relation to the maximum value of an indicator among all options.
6. Calculating the integrated indicators of for each option by criteria groups.
7. Creating a set of Pareto by drawing two criteria groups of points, which correspond to all options in the system of coordinates on the plane. Option choice.
In implementation of point 2 the indicators derivation owing to software complex plays a key role. This complex should produce a structure of the network equipment, types of multiplexer sections and their real loading, routes of the main and reserve channels according to a matrix of inclination, a length of channels in multiplexer sections, depending on available restrictions of a network and used equipment, such as the capacity of switching matrixes of the top and bottom levels, the number of slots for the printed circuits of linear outputs, the number of slots for the printed circuits of tributaries, etc.